Location Guidelines

APPLICATION/INSTALLATION GUIDELINES

To ensure an adequate air supply, locate drycoolers in a clean air area, away from loose dirt and for- eign matter that may clog the coil. In addition, drycoolers must not be placed near steam, hot air, or fume exhausts. Also, drycoolers should be no closer than 3 feet from a wall, obstruction or adja- cent unit with no obstructions over the unit. Install drycoolers in a level position to assure proper vent and drain.

All drycooler legs have mounting holes for securing the unit to steel supports or concrete pads.

For roof installation, mount dry- coolers on steel supports in accor- dance with local codes. To minimize sound and vibration transmission, mount steel sup- ports across load-bearing walls.

For ground installations, a con- crete pad will support the load.

Drycooler Installation

The drycooler should be located for maximum security and main- tenance accessibility. Avoid ground level sites with public access or areas which contribute to heavy snow or ice accumula- tions. Utilize centrifugal fan dry- coolers when placing a drycooler in a building.

Electrical Requirements of the Drycooler

Electrical service is required for all drycoolers at the location of the outdoor system. The power supply does not necessarily have to be the same voltage supply as required by the indoor unit. This separate power supply may be 208, 230, 460 or 575 volt, 60 Hz. For electri- cal characteristics of the standard voltage drycoolers, see Full Load Amps (FLA) of the drycooler in Tables 6 and 7 and FLA of the pump, if used, in Table 8. Dual element, time delay type fuses or “HACR” circuit breakers at the main power source. The only elec- trical connection between the

indoor unit and the drycooler is a two wire control interlock which is field-connected when provided.

Glycol/Inhibitor Solution

The percentage of glycol to water will be determined by the outdoor ambient in which the system is operating. Just as critical is the inhibitor used with the glycol.

Commercial ethylene glycol (Union Carbide Ucartherm, Dow Chemical Dowtherm SR-1, and Texaco E.G. Heat Transfer Fluid 100), when pure, is generally less corrosive to the metals than water. It will, however, assume the corro- sivity of the water from which it is prepared and may become increas- ingly corrosive with use if not properly inhibited. Proper inhibi- tor maintenance must be per- formed to prevent corrosion of the glycol system. Consult glycol man- ufacturer for testing and mainte- nance of inhibitors.

Automotive antifreeze is unac- ceptable and must not be used in any glycol fluid system.

There are two basic concepts of corrosion inhibition: They are clas- sified as corrosion inhibitors or environmental stabilizers. The cor- rosion inhibitors function by form- ing a surface barrier that protects the metals. Environmental stabi- lizers decrease corrosion by stabi- lizing or favorably altering the overall environment. An alkaline buffer, such as borax, is a simple example, since its prime purpose is to maintain an alkaline condition (ph above 7).

The quality of the water of dilu- tion must be considered because water may contain corrosive ele- ments which reduce the effective- ness of the inhibited formulation. Surface waters that are classified as soft and are low in chloride and sulfate ion content (less than 100 ppm each) should be employed.

Piping Considerations

CAUTION: When using water under pressure to test the system for leaks, immediately charge the tested system with glycol. Com- plete system drain-down cannot be assured. Replacing broken, frozen piping is a needless exercise. A preferred test method utilizes com- mon refrigerant gas pressurized with nitrogen. A refrigerant type leak detector will find even the smallest leak when properly used.

Galvanized pipe or other com- ponents should not be used with an inhibited glycol system.

All fluid piping must comply with local codes. Care in sizing pipes will help reduce pumping power and operating costs.

Manual shut-off valves and unions should be installed at the supply and return line of each major sys- tem component. This permits rou- tine service or emergency isolation of the component.

Where connecting to a city water supply, provide a disconnection means. A city water source is desir- able for initially charging the sys- tem and as an emergency standby cooling source.

The minimum glycol temperature to be supplied from the drycooler determines whether the supply and return lines should be insu- lated to prevent condensation (see Table 9).

Vents are required at system high points to vent trapped air when filling the system.

Since the system is not open to the atmosphere, an expansion tank must be provided for expansion and contraction of the fluid with temperature change. A relief valve is also necessary.

A fill port is necessary for charg- ing the system with glycol.

Depending on the complexity of the system, various other devices may be specified, such as pressure gauges, valves, pumps and sensors.

60 HZ specifications

The Liebert 60 Hz represents a significant breakthrough in the realm of power management and cooling solutions, specifically tailored for the demands of modern IT environments. Engineered by Vertiv, the Liebert brand is synonymous with reliability and innovation, and this model is no exception.

One of the standout features of the Liebert 60 Hz is its advanced design, which incorporates cutting-edge thermal management technologies. The system is adept at maintaining optimal operating temperatures for critical equipment, ensuring maximized uptime and increased operational efficiency. The integration of high-performance cooling solutions means that even during peak load conditions, the Liebert 60 Hz can operate effectively without compromising performance.

The unit operates at 60 Hz, making it compatible with North American power systems, an essential factor for many commercial and industrial setups. This frequency standard allows for seamless integration into existing electrical configurations, reducing installation challenges and costs. Coupled with its compact footprint, the Liebert 60 Hz is ideal for environments where space is at a premium.

In terms of energy efficiency, the Liebert 60 Hz utilizes state-of-the-art variable speed technology. This allows the system to adjust cooling output based on real-time environmental conditions, significantly reducing energy consumption while maintaining necessary cooling levels. The result is a lower carbon footprint and reduced operational costs, which is a critical consideration for organizations focused on sustainability.

Another notable characteristic of the Liebert 60 Hz is its modular design. This allows for easy scalability, making it an excellent choice for growing businesses. As IT demands increase, additional units can be added without extensive renovations or disruptions to existing setups. Furthermore, the system includes intelligent monitoring capabilities that provide real-time data on performance, enabling proactive management and maintenance.

In summary, the Liebert 60 Hz is a robust, efficient, and scalable power management solution designed to meet the rigorous demands of contemporary IT infrastructures. With its energy-efficient cooling, modular design, and ability to operate seamlessly within North American power grids, it stands out as a leading choice for businesses aiming to enhance their operational resilience and efficiency. Whether for data centers, telecommunications, or critical infrastructure, the Liebert 60 Hz proves to be an invaluable asset in modern technology landscapes.